384 BULLETIN No. 189 [June, 



1 ' LETTUCE ' 



On Corn-Meal Agar. Growth fair. Mycelium white, fine, slightly aerial, and 

 somewhat flaky. No zonation. 



On Green-Bean Agar. Growth good. Mycelium white, loose, flat, and rather 

 dense, running out in strands. One indistinct zone present. 



On Oat Agar. Growth fair. Mycelium white, loose, flat, interwoven, and 

 somewhat tufted. One zone present. 



On Potato Agar. Growth fair. Mycelium dark, fine, and practically all sub- 

 merged. No zonation. 



On Potato-Glucose Agar. Growth god. Mycelium white and flat, running 

 out in radial strands. No zonation. 



On Agar XII. Growth good. Mycelium white, loose, flat, and rather dense. 

 No zonation. 



"ONION" 



On Green-Bean Agar. Growth fair. Bright colored mycelium, fine and sub- 

 merged at center; a little aerial mycelium at the outer edge, where it was some- 

 what loose. No zonation. 



On Potato Agar. Growth fair. Mycelium fine, scarcely visible, and of a 

 bright color. No zonation. 



On Agar XII. Growth fair. No aerial mycelium. No zonation. 



"POINSETTIA" 



On Corn-Meal Agar. Growth fair. Mycelium white, dense, fluffy, and com- 

 pact. Zonation indistinct. 



On Green-Bean Agar. Growth fair. Mycelium white, loose, compact, and 

 fluffy. No zonation. 



On Oat Agar. Growth good. Mycelium white, loose, flat, and radial; edge 

 somewhat fluffy. No zonation. 



On Potato Agar. Growth fair. Mycelium somewhat flaky and compact. Three 

 zones present. 



On Potato-Glucose Agar. Growth fair. Mycelium brown and flat at center; 

 outer edge white, loose, and somewhat flaky. Zonation indistinct. 



On Agar XII. Growth fair. Mycelium white, flat, dense, and radial, like 

 alternanthera. One zone. 



"POTATO E. SOL." 



On Corn-Meal Agar. Growth fair. Mycelium fine and flat. No zonation. 



On Green-Bean Agar. Growth fair. Mycelium loose at edge, compact and 

 fluffy at center. Several zones present, two distinct. 



On Potato Agar. Growth fair. Mycelium white and fluffy. One zone at center. 



On Agar XII. Growth poor. Mycelium mostly submerged and somewhat com- 

 pact; flaky at center. Zonation. 



"POTATO R.P.O." 



On Corn-Meal Agar. Growth fair. Mycelium white, fine, and rather scant. 

 No zonation. 



On Green-Bean Agar. Growth good. Mycelium loose at edge, flat, dense, 

 somewhat fluffy, and rather dark. Three zones present. Growth very much like 

 strains from carnation. 



